Wow! Most of your name choices have at least 6 syllables in them before you get to the second middle name. It would be great to know how many syllables are in your last name as well as it's first initial of that surname. It would be great to not have initials spell anything (AletheaReverieLedaOwen - ARLO?). Despite the longer syllable names, it may be best to vary the syllable count among the middle names. A 3-3-3-? sounds a bit monotone no matter how lovely.

With regard to what I personally feel is best, I'm definitely on board with Cosima as my favorite. Persephone is a bit too known perhaps. Whatever you do, I'm definitely feeling your stylistic choices.

basicsand -We were finding it difficult to make combos, probably because our name choices are quite long..Our surname is 2 syllables and starts with a D, so Persephone D____ doesn't sound too long. Persephone Hespera Juno D____ does sound long but it's not something that bothers us too much, as all of our family have rather long names too! Thanks! I love Cosima too.